Pathfinder is SLOW. It's great on paper but its so poorly executed it makes browsing files unbearable. It's never worked well on any of my systems: Mac Pro 1,1, Macbook Pro 2011, Macbook 2007 and 2009, iMac 2008. Also, it has never actually replaced the finder, rather, it is its own application. So by default, the finder is still the primary browser.
TotalFinder is a godsend. It does exactly what everyone has been wanting: cut/copy/paste functionality, TABBED browsing and showing hidden files on demand. The Tabbed Browsing in TotalFinder is pretty much perfect. To render Pathfinder useless, it actually ADDS ON to the standard Finder rather being its own application. But more importantly, its not slow as crap. However, when resizing windows I *have* noticed a bit of lag. Its not as smooth as without TotalFinder but it is a bit choppier. I can live with that if I'm given tabs.
Combine either of the options with RightZoom and OS X performs the way it should; Tabbed Browsing and the green button expands the window to the full screen, rather than some weird size you dont expect.